Camera Positioning (Similar to Maya?)
When you are in he camera view (numpad 0), you can either use the "lock camera to view" option in the right menu in the viewport (open with N).


or press Shift+F for a egoshooter-like camera control (WASD to move, Q and E to move up and down and tab to enable gravity and finally the mousewheel to control your speed). I think this is the best option for camera positioning.